[xmonad] darcs patch: Actions.DisplayUI, for displaying bindings onscreen during screencasts

[wirtwolff]

Brent Yorgey wrote:
> Can you re-send this patch?  Sorry for the long interval.  I tried
> applying it but I'm getting a darcs error.
>
> -Brent
>
>   

Actually, I'll probably just wait and resubmit with submap functionality.
May even wait till after keys refactor to revisit it. Not as if heaps of
people are creating screencasts, and adding an audio narrative seems
a good enough solution for now.

thanks,
-- wmw